With the word “ PM2.5” _________ appearing in media reports, people pay greater attention to it and seek health tips for smoggy days.

In my opinion, she is too young to take care of the pet dog ______.

The houses in this village are______built of bricks.

I think it is really____ worth_____ my advice on returning the amber room to Russia.

I’m afraid I can’t attend your wedding ceremony, but thanks for the invitation_______.